Portege M400 - No sound on Windows 7

I installed windows 7 Ultimate version on my Portege M400. all works except the sound.
There is a error in device manager under other devices - Unknown device - details hardware Ids--> ACPI\TOS620A. not sure if this has anything to do with the sound.
Please help.
Thanks
Mani

Hi
I have founded a similar thread regarding this no sound problem and the unknown device TOS620A. Check this:
http://forums.computers.toshiba-europe.com/forums/thread.jspa?messageID=182958
But I can say that TOS620A has nothing to do with the sound. I think it has something to do with Bluetooth or HDD protection

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